Hoisting mechanism for motor-vehicles.



G. A. WOOD.

HORSHNG MECHANISM FOR MOTOR VEHICLES. APPLICATION FILED JUNE 7. I9I7- RENEWED APR. 26. 1918.

1 2'? 1 9?? Patented July 9, 1918.

2 SHEETS-SHEET l.

e. A. WOOD.

HOISHNG MECHANISM FOR MOTOR VEHiCLES,

APPLICATION FVILED mm 7, 19:1. RENEWED APR. 26. 1918.

Eatems 5M3; 9,1918

2 SHEETS-SHEET 2.

entrain erm ne Parana carton.

GARFIELD A.

WOOD, OF DETROIT, MICHIGAN.

HOISTING MECHANISM EOE MOTOR-VEHICLES.

Original application filed August 28. 1916. Serial No. 117,236.

1917, Serial No. 173,377. Renewed April 26, 1918.

'0 all whom it may concern:

Be it known that I, (tun-mm A. 'ooo, a citizen of the United States, and residing at Detroit. in the county of Wayne and State of Michigan, have invented a new and Improved Hoisting Mechanism for Motor- Vehicles. of which the following is a specification.

It is common practice to dump the contents of truck bodies by lifting the front. end upwardly about pimt's at the rear end of the chassis. and lrvdranlie hoisting means has been used for this purpose. The most convenient source from which to operate the hoisting means is the propeller shaft (ordinarilyarranged longitudinally of the vehicle); but. on account of the fact that the heavy loads and shocks incident tohoisting are borne on the side frames and independently of the propeller shaft, the deflection of the former is not transmitted to the latter. Again, it is desirable to provide for slight inaccuracies in the construction of either hoisting means or chassis (often made by different manufacturers), whereby as scmbling of the parts is facilitated. It is further desirable to avoid the liability of leakage which results from independently supporting the pumping and hoisting elements of which the hoisting means as a whole is made up, and to provide for con venient control of the mechanism by the driver of the vehicle. \Vith these ends in view, the. present invention consists in a dr ven shaft of a motor vehicle together with a hollow pump gear through which said shaft passes together with means for driving said pump-gear from said shaft regardless of a possible lack of exact relative alinement of the parts; in a pump mounted on the lower side of the base of the cylinder whereby the body is tilted; in a pump having a valve, both pump and valve being located below the base of the hoisting cylinder, together with a control lever for the valve mounted at a point near the upper end of the cylinder; in a supplementary frame including a plurality of spaced bars extend ing across between the side bars of the vehicle and having the base of the cylinder resting thereon, and a pump suspended from the base of the cylinder in the space between the spaced bars; and in certain details of consruction shown, described and claimed.

Patented July 9, 1915..

Divided and this application filed June 7,

Serial No. 231,02A.

The present application is a division of my application for patent Serial No. 117,236, tiled August 28, 1916.

in the drawings,

Figure 1 is a fragmentary side view of a motor truck showing a preferred embodiment of my invention. Fig. 2 is a part front elevation and part section on the line 22 of Fig. 1, parts being omitted. Fig. 3 is a part-elevation part-central vertical sec-. tion corresponding to Fig. 1. big. 4 is an enlarged view on the line H of Fig. 3. Fig. 5 is a section on the line 5- of Fig. 3. Fig. i is a plan view of the clutch mechanism. parts being broken away. Fig. 7 is a section on the line 7-7 of Fig. 6.

Similar reference characters refer to like parts throughout. the several views.

1 indicates the side frames of the vehicle to the rear end of Which are secured brackets 2 bearing pivots 3 about; which the body 4 may be. swung vertically for dumping pur-v poses. Thebody may include the longitu-v dinal frame pieces 5 so arranged as to rest, when in lowered position, either on the side frames 1 or on special chairs'carried thereby (not shown). This general construction is well known.

The side frames may be cut away ata point (3 forward of the front end of the body, and may there support the cross bars 8 (preferably angle-irons having their horizontal flanges facing each other) upon which.

rests the flanged base 9 of a hoisting cylinder 10, the piston rod 11 of which, through cross bar 12, sheaves 13, cables 14 (shown in dashed lines in Fig. 1), equalizing bar 15, shackle 16 (omitted in Fig. 1) and brackets 17 secured to thebody, serves to elevate the front end of the latter. The cylinder has secured to its upper end a cham her or tank 19 that may be in free communication with the interior of the cylinder above the piston, whereby storage space for liquid is formed.

Attached to the base 9 by bolts 21 is a gear pump 22 containing the driven gear 23 and the annular driving gear 24, the latter being keyed on a Sleeve 25 rotatable in roller bearings 26 that turn in the threaded hubs 28 integral with the pump casing. The joints between the hubs and the' sleeve may be sealed by the packing 29 and packing nuts 30, and in order to allow the rollers to be assembled, a: retaining ring 31 may be threaded into each of the hubs. Passing through the sleeve is the usual propeller shaft 34, and it -will be seen that the rela- 5 tive dimensionsv of the parts is such as to allow considerable deflection. of the .side frames and hoisting cylinder without bringing the sleeve into bearing engagement with the shaft.

The latter has rigidly secured thereto a clutch member that may be formed ,of the duplicate clamp sections 35 secured together by bolts 36. Slidablymounted upon the sleeve is a clutchv shifting member 38,

grooved at 39 to receive the yoke blocks 40 into which are threaded the bolts 41 that also pass through the ends of the levers 42.

The latter are secured to a shaft 43 that is mounted in the ears 44, rigid with the pump casing, and may be swung about the axis of the shaft by an arm 45 and a link 46 pivoted at 47 to a lever 48 that, in turn, is

pivoted to the tank 19 at 49,. .lrojecting from the member 38 at each side is an car 50 (Fig. 6) through which passes a bolt 51 that is threaded therein; reduced portions of these boltsalso extend through an annular clutch ring 52 and have reduced inner ends 53 that slide longitudinally in slots 54 formed in 1 the sleeve 25. Thus the sleeve, the member 38 and the clutch ring are constrained to rotate together, while the two last mentioned members are slidable on the sleeve. The clutch ring is slidable radially of the propeller shaft on the pins or bolts 51 to auto- .matically compensate in one direction for lack of alinementl between the propeller shaft and the sleeve. Lack of alinement in a direction at right angles to that first mentioned is provided for by slippage of the clutch members 35 on teeth 55 that project from the ring 52, and overlap the members 35 when thrust to the left (Fig. 6). Consequently, rotation of the shaft may be transmitted undiminished to the sleeve even though their axes are not coincident and regardless of the fact that considerable deflection of the sleeve may take place when lifting heavy loads. As stated previously, the tank 19 constitutes a storage receptacle for liquid (preferably oil) and communication is established between the tank and intake passage 58 of the pump (Fig. 5) by a pipe 59 and 5 fitting 60, and is expelled from the gears through the discharge passage 60 that may be brought into connection with the'space between the lower endzof the cylinder and A the piston, (not shown) 5). Another passage 63 leads from, the intake to the passage 62, and, when the valve is in the position shown, the liquid lay-passes the gears arid the piston sinks. Various other ar- 6 rangcments of passages for the liquid may,

by a three-way valve 60 61 and passage 62 (Fig.

described is besides the advantages alof course, be used, but that preferred since,

ready stated, the liquid may be circulated of vboth the lever 66 and the lever 48 may be limited by the stop 67 that. projects from the tank 19.

It will be observed that the bars 8 constitute a frame (supplementary to that of the chassis and resting thereon) on Which is directly carried a unit which comprises both .80 p the hoisting cylinder and the gear pump. This'construction is of much importance for the reason that, were the gear pump mounted directly on the chassis or on the' engine, the heavy shocks and loads to which the cylinder is subjected and the extremely high liquid pressures which are necessarily employed would cause relative deflections subh as would render it practically impossible to maintain tight joints. Again, the construction, being itself assembled and in eluding all necessary parts, is readily as.- sembled on and accommodates itself. Withoutalteration to slight variations in the chassis. Its control levers are located at a point Where they are accessible to the driver and yet do not interfere with the other control mechanism by which the adjacent foot space is ordinarily substantially filled.

Obviously, the details of the various parts may be changed without departing from the spirit of my invention, I do not, therefore, wish to be limited otherwise thanas indicated by the subjoined claims.

I claim:"

1. In combination with the frame and-a rotatable shaft of a motor vehicle, a hoisting device supported by the frame, and

v mechanism for actuating the hoisting device from the shaftfsaid mechanism including a gear pump comprising a housing, .a driven gear and a driving gear therein, a hollow rotatable sleeve" to which said driving gear is secured, anti-friction hearings in the housing for said the joints between said sleeve and the housing, said shaft passing through the sleeve and being spaced therefrom, a clutch member secured to the shaft-.a second clutch member carried by thesleeve and rotatable therewith, andmeans for moving said sec-' ond clutch member longitudinally of theshaft to connect it to or disengage it from the first mentioned clutch member at-will,

the second clutch member also being spaced froin the shaft, whereby deflection of the frame and gear pump, due to loads on the hoisting device, may take place without inducing bending stresses in the shaft 2. In combination withthe frame and a -0 sleeve, means'for sealing 115 the former, said means allowing deflection of the frame and pump relatively to theshaft, due to loads on the hoisting device, without inducing transverse bending stresses in the shaft.

3. In combination with the main frame and driving shaft of a motor vehicle, a cross frame supported on the main frame, a pump supported on the cross frame, a hoisting cylinder and piston also supported on the cross frame, means whereby liquid pumped v by the pump may cause the piston to be elevated in the cylinder, said pump including a rotatable pumping member spaced from the driving shaft, the driving shaft pass- -ing through the pumping member, and means for connecting said driving shaft to said rotatable pumping member so that the latter is driven by the former, said means allowing deflection of the frame and pump, relatively to the shaft, due to loads on the hoisting system, without inducing tinneverse bending stresses in the shaft.

4. In combination with the frame and a rotatable shaft of a motor vehicle, a hoisting device supported by the frame, and mechanism for actuating the hoisting device from the shaft, said mechanism including a gear pump carried by the frame comprising a driven gear and a driving gear, a hollow rotatable sleeveto which the driving gear is secured, said shaft passing through said sleeve and being spaced therefrom, a clutch member secured to the shaft, a second clutch member carried bv the sleeve and rotatable therewith. and means for moving said second clutch member longitudinally of the shaft to connect it to or disengage it from the first mentioned clutch member at will, the second clutch member also being spaced from the shaft, whereby deflection of the frame and gear pump, due to loads on the hoisting device, may take place without inducing bending stresses in the shaft.

5. In combination with the frame and a rotatable shaft of a motor vehicle, a hoist ing device supported by the frame, said mechanism including a hollow fluid impellinginember, said shaft passing through said hollow'member and being spaced therefrom whereby relative movement of the hollow member and the shaft transversely of the transversely of axis of the latter is allowed, and mean, for driving. the hollow member from the shaft at will,

ii, In. combinati-fin with the :t'rame and a rotatable shaft of a motor vehicle, a hoisting device supported by the frame, said devic including a liquid impelling n'ien'iber surrounding said shaft and spaced therefrom, and mechanism for actuating the hoisting device from the shaft, part of said mechanism being carried by the shaft and another part being supported independently thereof, one of the parts being capable of movement transversely of the shaft, whereby deflection of the frame in respect to the shaft may take place without inducing bendi g stresses in the shaft.

7. In combination with the frame and. a. rotatable shaft of a motor vehicle, a hoisting device supported by the frame, said device including a liquid impelling member substantialy concentric with and spaced from the shaft, and clutch mechanism for actuating the liquid impt g "5 the shaft, part of said i. ing carriedby the she a and being support 5. indcpe ty thereof, one of the parts be ng eapole of movement 8., In combinationw i. rotatable of a motor vehicle.

ing device suppta'ted by the tram vice including a liquid impelling member substantially concentric. with and spaced from the shaft, and clutch mechanism for actuating the liquid impellin member from the shaft, art of the clutch mechanism be ing earriec by the shaft and another part being supported independently thereof, one of t e parts being capable of movement, transversely of the shaft, whereby deflection ofthe frame in respect to the shaft, due to loads on the hoisting device, may take plate without inducing transverse bending stresses in the shaft, one of the clutch parts being movable longitudinally of the shaft to engage with or disengage from the other part whereby rotative movement of the shaft is made to cause rotative movement of the clutch part that is supported inde iendently of the shaft.

5). in combination with the frame/and a rotatable shaft of a motor vehicle, a hoisting device supported by the frame, said device including a hollow rotatable member supported by the fran'ie and through which the shaft passes, said shaft being spaced from the member. clutch u'iember secured to the shaft, 21 second clutch member extending around the hollow rotatable member, one of the clutch members being movable longitudinally of the shaft to be engaged with or disengaged from the other clutch member at will.

it In combination with the frame and a the itili'd and a spaced from the'member, a member surrotatable shaft of aim otor vehicle, a driven -mechanism supported by. the frame, 'said mechanism including a hollow rotatable member supported by the frame and through which the shaft passes, said shaft being rounding said rotatable member and con- I strained to rotate therewith and slidable longitudinally thereon, a clutch member supported by said last named member, and a second clutch member supported bythe shaft and cooperating with the first clutch member. 11. In-combination with the frame and a rotatable shaft of a motor vehicle, a driven Imechanism supported by the frame, said mechanism including a hollow rotatable member supported by'the frame and through which the shaft passes, said shaft being ;spaced from the member, a member surrounding said rotatable member and constrained to rotate therewith and slidable longitudinally thereon, a clutch .member sup ported by said last namedmember, and .a second clutch member supported by the shaft and cooperating with'the first clutch member, said first named clutch member be ing tiltable on the slidable member.

' 12. Incombination with the frame and a rotatable shaft of a motor vehicle, a liquid impellin member concentric with said shift, a s eeve interposed between said member and vshaft and ,rigid with said member,

said sleeve being spaced from the shaft and projecting along said shaft in one direction her and shaft and rigid with said member,

said sleeve being spaced from the shaft and projecting along said shaft in one direction beyond. the corresponding end ofrthe member, a bearing for the projecting portion of the sleeve, and clutch means for driving the sleeve from the shaft, said clutch means including two members, one of the members being supported by the projecting portion of the sleeve, shaft. 4

14, In combination with the frame and a rotatable shaft of a motor vehicle, a hoisting device supported by the frame, said mechanism including a hollow fluid impelling member, said shaft passing through said hollow member and being spaced therefrom whereby relative movement of the hollowmember and the shaft transversely of the axis of the latter is allowed, means for driving the hollow member from the shaft at will, and mechanism for,controlling said driving means at will, said mechanism being so constructed and arranged that its Weight tends to hold the driving means outof driving relation.

GARFIELD A. WOOD.

the other being carried by the 

